Winding machine traverse device



Feb. 1, 1955 H. L. MUSCHAMP ET AL 2,701,198

' WINDING MACHINE TRAVERSE DEVICE Filed Dec. 6, 1950 United StatesPatent 1 2,701,108 WINDING MACHINE TRAVERSE DEVICE Harold LionelMuschamp, Bramhall, and John Robert Grady, Cheadle Hulme, England; saidGrady assignor to said Muschamp Application December 6, 1950, Serial No.199,411

Claims priority, application Great Britain December 9, 1949 2 Claims.(Cl. 242-31) The present invention relates to winding machines andparticularly to variable traverse yarn guides for such machines.

Various forms of mechanism have been proposed for providing a yarn guidewith a variable traverse mechanism for machines of this kind. These haveall been more or less complex in construction and have usually includedone or more pivoted links. The pivots so included are, of course,subject to wear and so eventually lend to inaccuracy in operation.

It is an object of the present invention to provide a variable yarnguide traverse mechanism for winding machines of simple construction inwhich the use of links is eliminated and the number of moving parts iskept as small as possible.

According to the present invention a variable yarn guide traversemechanism includes a rotatable face cam, the throw of the cam beingdifferent at different radial distances from its centre, a yarn guidemounted on a pivot substantially at right angles to the axis of the camand a cam follower attached to the yarn guide, said cam follower beingadjustable to contact the face cam at varying distances from its centre,thereby allowing the traverse distance of the yarn guide to be adjusted.

It will be apparent that the shape of the face cam must be such as tocause the yarn guide to be traversed at substantially constant speed tolay the yarn evenly in windmg.

In its simplest form the cam comprises a conical plate set on arotatable shaft, so that the axis of the cone makes a small angle withthe axis of rotation. The cam is preferably arranged on the shaft sothat the surface of the cam at the limit of throw in one direction issubstantially at right angles to the axis of rotation, so that the limitof throw in this direction is constant, whilst the limit of throw in theother direction, occurring when the cam has been turned through 180, isvariable according to the distance from the axis that the cam iscontacted by the cam follower.

Similarly, where the yarn guide isto be traversed several times for eachrevolution of the cam the cam may take the shape of an equally crimpedor corrugated disc, the distance between the crest and trough of eachcorrugation varying with the radial distance from the centre; again itis preferred that the crest of the corrugations should be substantiallyat right angles to the axis of the cam, so that the limit of traverse inone direction remains constant.

The preferred form of face cam for use in connection with the presentinvention comprises a crimped disc having concentric flat surface,circular paths formed on the face of the cam member, the crest of allthe paths being substantially level and the troughs all at differentlevels. Alternatively the troughs may all be level and the crests all atdifferent levels.

The yarn guide and cam follower are preferably formed as one unit whichis pivoted centrally, the yarn guide forming one arm of the unit and thecam follower the other arm, having the portion which actually contactsthe cam mounted on a pin slidable parallel to the pivot. The contour ofthe contact portion will be cylindrical where a cam with separate fiatsurface cam paths is used or spherical if using a cone or plain crimpeddisc.

In order that the invention may be more clearly understood reference ismade to the accompanying drawings, wherein:

Figure 1 is an end vew partly in section of one form of yarn guidetraverse mechanism,

Figure 2 is a front view of the mechanism,

Figure 3 is a front view of a modified form of construction.

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The present construction of yarn guide traverse mechanism is primarilyintended to be attached to the movable carriage of a cap or pirn winderand is so shown in the drawings.

A pirn winding machine includes a carriage 1 for the traversing yarnguide which is movable parallel to the axis of the pirn core 2, whichmay be rotated by any known means. The carriage 1 has two downwardlyprojecting apertured bosses 3, through which passes a square sectiondrive shaft 4 on which a face cam 5 is mounted between the bosses withsubstantially no lateral clearance, so that the cam 5 moves along itsdrive shaft with the carriage, being captive between the bosses 3.

The face of the cam 5 is formed with four separate concentric wavy campaths 6, each having two crests and two troughs. The crests of all thecam paths are on the same level and the troughs are at different levels,the depth of the troughs being increased progressively with the diameterof the path, so that each cam path will transmit a different throw to acam follower, whilst at the beginning of each winding operation theright hand limit of throw of the yarn guide will always be the same,irrespective of the magnitude of the throw.

The yarn guide structure comprises a yarn guide memher 7 rigid with acam follower arm 8 mounted on a pivot 9 located in the carriage 1. Inthe end of the cam follower arm 8 is mounted a contact member 10 havinga cylindrical contact head 11, adapted to roll on the cam face. Thecontact member 10 is longitudinally movable in its mounting so that itcan be adjusted for its head to contact a desired cam path 6 and thusselect the traverse distance imparted to the yarn guide 7.

A spring 12 is mounted round the yarn guide pivot to urge the camfollower into engagement with the cam, and thus ensure that the contactmember correctly follows the cam contour.

In the modified structure shown in Figure 3 the face cam is formed as aconical disc 14, whose axis is oblique to the shaft 4, on which it ismounted for drive. The construction is identical in other respects withthat shown in Figures 1 and 2, save that the contact head will be formedwith an appropriate contour.

What we claim is:

1. In a variable yarn guide traverse mechanism for a light movablewinding carriage of a cop winder and the like, wherein a rotary cam foractuating the traverse is mounted on the carriage and rotated by adriven shaft on which it is slidably keyed, wherein a pivot shaft havingan axis at right angles to the axis of a cop being wound is mounted onthe carriage between said driven shaft and said cop and wherein saidshaft carries a light wire-weight yarn guide at one end thereof forpivotal movement therewith, that improvement which comprises a pluralityof concentric radially-spaced cam faces extending axially from said cam,each of said faces defining one separate traverse pattern, a feeler armfixed on the end of said pivot shaft opposite said guide, a cam feelershaft slidably mounted in said arm and a cam feeler on said shaft, thecam feeler shaft extending along one radius of said driven shaft in eachposition thereof and being movable along said radius to a plurality ofpositions, each of which will position the cam feeler on a separate camface, whereby adjustment of said feeler shaft in said feeler armpredetermines the traverse pattern of said mechanism.

2. The device as set forth in claim 7 wherein one end axial position ofeach of said cam faces is the same along one radial line for making oneend of each traverse pattern identical.

References Cited in the file of this patent UNITED STATES PATENTS1,945,659 Schweizer Feb. 6, 1934 2,196,416 Jacob Apr. 9, 1940 2,267,899Dersen Dec. 30, 1941 FOREIGN PATENTS 273,175 Great Britain June 30, 1927487,159 Germany Dec. 3, 1929 174,987 Switzerland Apr. 16, 1935

